Yttrium Iron Garnet
Prduct Description
Deltronic Crystal’s single-crystal Yttrium Iron
Garnet (YIG) is the most thoroughly characterized
ferrimagnetic material available.
For Magneto-optical applications, magnetically
saturated YIG rods rotate the polarization plane of
light. Known as the Faraday effect, which is used in
optical isolators.
For Microwave applications, YIG spheres high-Q
resonance over a broad frequency range makes its
use attractive in a variety of products including,
magnetic resonance filters, tuned oscillators, and
tuned band-reject and band-pass filters.
Applications
•
•
•
•
•
•
•
Optical Isolators
Multiplexers
Tuned Oscillators
Band-reject Filters
Optical Switches
Magnetic-field Sensors
Fiberoptic Sensors
Features
• Low Temperature Dependence of Faraday
Rotation
• Highly Transparent from 1.2 - 5mm
• High Q for Microwave Applications
• Grown by Flux Technique
• Superior Properties for both Optical and
Microwave Applications
Property at 25°C
Empirical Formula
Molecular Weight (grams)
Crystal Structure
Space Group
Density (g-cm3)
Melting Point (oC)
Hardness (moh)
Lattice Constant (Å)
Saturation Magnetization (Gauss)
Ferrimagnetic Resonance Linewidth (Oe)
Magnetic Anisotropy (erg/cm3)
Magnetic Anisotropy (erg/cm3)
Effective g factor
Gyromagnetic ratio (MHz/Gauss-1)
Magnetostrictive Coefficient
Magnetostrictive Coefficient
Magnetostrictive Coefficient
Electrical Resistivity (Ù/cm)
Young’s Modulus
Poisson’s Ratio
Pure YIG
Ga:YIG
Y3Fe5O12 Y3Fe4.05Ga.95O12
737.95
751.13
Cubic
Cubic
La3d
La3d
5.17
5.28
1555
1545
6.5 to 7.0
12.376
12.36
1780
400
<0.30
<0.95
-6.20 x 10-3 -1.7 x 10-3
-0.05 x 10-3 -6.20 x 10-3
2
2
2.8
2.8
-2.73 x 10-6 -0.95 x 10-6
-1.25 x 10-6 -0.95 x 10-6
-2.20 x 10-6
1 x 1014
2 x 1012
1 x 1012
0.29
0.25
Dielectric Constant
Curie Temperature (K)
Thermal Conductivity (W/cm-1/°C-1)
15
553
0.074
15
Property at 25°C
Pure YIG Ga:YIG
Thermal Expansion Coefficient (°C-1) 1.04 x 10-5
Refractive index, 1310 nm
2.2
Refractive index, 1550 nm
2.19
Specific Heat
4.5
Optical Absorption, 1310 nm (cm-1)
0.05
0.05
-1
Faraday Rotation, 1310 nm (°mm )
21.4
14.5
Transmittance1 (%)
>95
>95
-1
Magneto-optical Sensitivity (°A )
0.14
0.6
Crystallographic Orientations, Dimensions, and Tolerances
Standard Dimensions:
Faraday Rotators
2.1, 2.7mm length
Spheres
1.8 to 5mm diameters 0.007" to 0.1"
Dimension Tolerances
±0.005" length, ±0.002" diameter
Orientations
<100>
Flatness
<λ/5 at 633nm
Surface Quality
<10/5 (scratch/dig)
Parallelism, polished faces
<10 arc-minutes
Anti-reflective Coatings
Specify
Other Dopants
Specify